Season 3, episode 24.
Original air date: 11 February 1954.
Cast: Jack Webb (Sgt Joe Friday), Ben Alexander (Off. Frank Smith), Billy Chapin (Richard Kessler), Mae Clarke (Jean Kessler), Robert Clarke (Larry Bartell), Celia Lovsky (Jeanette Bejan), Lilian Powell (Mrs. MacIntosh), George Fenneman (Announcer opeming: uncredited) and Hal Gibney (Announcer closing: uncredited).
From: IMDB.

Wow, this is one of the reasons I love watching old movies/tv...you never know who you'll see. The maid in the beginning is Austrian actress that played on the original Star Trek series. Nice little 'inside joke when Friday says..."she sounds Viennese to me". Also, notice that mansions were valued at $50,000.00! The radio version of this is more detailed and you hear more of the story, but this was good.

She was Mrs. Peter Lorre ... 13 years after this "Dragnet" she played the Vulcan matriarch T'Pau in the classic "Star Trek" episode "Amok Time."